<form action="submit" method="post" enctype="multipart/form-data">
<input type="file" name="file1"/>
<input type="file" name="file2"/>
<input type="hidden" name="key1" value="value1"/>
<input type="hidden" name="key2" value="value2"/>
<select multiple="multiple" name="select" size="5"><option value="1">1</option><option value="&">2;</option></select>
<input type="submit" name="submit" value="submit"/>
</form>